The AC10 is one of Vox's better ideas. Like many inexpensive amps, its biggest weaknesses are tubes and speakers. The AC10 comes standard with cheap Chinese tubes and a Vox branded speaker that sounds pretty good but is not terribly efficient. But.... Replace those tubes with Tung Sol 12ax7 (2) and JJ EL84 (2) and the tone improves dramatically. Better yet, Eminence is now producing their famous Red Fang speaker in a 10" ceramic version and wow, is it great! It does add a pound or two to the little AC10 but the Red Fang sounds simply amazing and is so efficient it lifts the little AC10 solidly into the realm of an AC15. It allows the little AC10 to easily hang with a drummer and pours tone into your ears in buckets. Vox hit a home run with the AC10. These two inexpensive mods will move it to another level. Congrats brother Sims on a great little amp. Try these two mods. Thank me later.